<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .container {
        display: flex;
      }
      .div {
        border: 1px solid red;
        flex: 1;
      }
    </style>
  </head>
  <body>
    <div class="container">
      <div class="div">我是一个div</div>
      <div class="div">我是一个很多字div</div>
      <div class="div">我是一个更多字而且第三个div</div>
    </div>
  </body>
</html>
